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Durable Square Nuts from China | Four-Sided Nuts Supplier & Factory for Machinery and Furniture Applications
| Product Name | Square Nut / Four-Sided Nut |
| Standards | DIN 557, DIN 562, ASME B18.2.2, or customized |
| Material | Carbon Steel |
| Stainless Steel (SS304, SS316) | |
| Brass | |
| Grade | 4, 6, 8, 10 / A2-70, A4-80 |
| Thread Type | Metric / UNC / UNF / BSW |
| Surface Finish | Zinc Plated (Clear / Yellow / Blue) |
| Black Oxide | |
| Hot-Dip Galvanized (HDG) | |
| Plain / Polished | |
| Size Range | Metric: M4 – M24 |
| Inch: 1/4" – 1" | |
| Custom sizes available upon request |
Furniture assembly
Metal structure fastening
Railings, brackets, and mounting systems
Agricultural and mechanical equipment
Vintage or restoration hardware
Wood and metal construction
| Packaging | Bulk in cartons and wooden pallets |
| Small boxes or polybags with labels | |
| Custom packaging available upon request | |
| Lead Time | 7–30 days depending on quantity and custom orders |
| Shipping Port | Tianjin, China |
Professional manufacturer with over 10 years of experience in the fastener industry.
ISO 9001 certified with full quality control and inspection systems.
Wide range of sizes and finishes to meet global standards.
OEM and ODM services available.
Fast response, stable supply, and efficient export logistics.
Trusted by customers in over 40 countries.
Our square nuts and four-sided nuts are manufactured in accordance with DIN 557, DIN 562, ASME B18.2.2, or customized specifications to meet global project requirements.
We supply square nuts in Carbon Steel (Grade 4, 6, 8, 10), Stainless Steel (SS304, SS316 / Grade A2-70, A4-80), and Brass to suit different environmental and strength requirements.
We offer a wide sizing selection including Metric sizes (M4 – M24) and Inch sizes (1/4" – 1"). Thread types include Metric, UNC, UNF, and BSW. Custom sizing is also supported upon request.
You can choose from Zinc Plated (Clear, Yellow, or Blue), Black Oxide, Hot-Dip Galvanized (HDG), and Plain/Polished surface finishes depending on your application needs.
Our standard lead time ranges from 7 to 30 days, depending on the order quantity and customization requirements. All shipments are processed and loaded at Tianjin Port, China.
We provide standard bulk packaging in cartons and wooden pallets, small boxes or polybags with customized labels, as well as bespoke packaging designs upon request.